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1
CHECK AIR INTAKE SYSTEM.
1) Turn ignition switch to ON.
2) Start engine, and idle it.
3) Check intake manifold, idle air control solenoid valve
and throttle body for loose installation and gasket for
cracks.
4) Check by-pass hoses for loose connections and cracks.
5) Check vacuum hoses for disconnections.
OBD0362A
2
CHECK OUTPUT SIGNAL FROM ECM.
1) Turn ignition switch to ON.
2) Measure voltage between ECM and body.
: Connector & terminal
(B84) No. 11—Body / 3 V, or more
(B84) No. 12—Body / 3 V, or more
: Go to step 4.
: Go to the next step.
OBD0362A
3) Turn ignition switch to OFF.
4) Disconnect connector from idle air control solenoid
valve.
5) Turn ignition switch to ON.
6) Measure voltage between ECM and body.
: Connector & terminal
(B84) No. 11—Body / 10 V, or more
(B84) No. 12—Body / 10 V, or more
: Repair short circuit of harness and replace ECM.
: Go to next.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Go to step 3.
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OBD0366
3CHECK IDLE AIR CONTROL SOLENOID
VA LV E .
1) Turn ignition switch to OFF.
2) Measure resistance between solenoid valve terminals.
: Terminals
No. 1—No. 2 / 20Ω, or more
No. 2—No. 3 / 20Ω, or more
: Replace idle air control solenoid valve.
: Go to next.
: Terminals
No. 1—No. 2 / 5Ω, or less
No. 2—No. 3 / 5Ω, or less
: Replace idle air control solenoid valve and ECM.
: Go to next step.
OBD0683
3) Remove idle air control solenoid valve.
[W12A0].>
4) Check operation of idle air control solenoid valve.
: When connecting the battery to terminals
No. 1 and No. 2 of idle air control solenoid
valve, check if it is fully opened.
: Go to next.
: Clean idle air control solenoid valve.
[W12B0].>
OBD0684
: When connecting the battery to terminals
No. 3 and No. 2 of idle air control solenoid
valve, check if it is fully closed.
: Go to step 4.
: Clean idle air control solenoid valve.
[W12B0].>
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B2M0253A
4CHECK POWER SUPPLY TO IDLE AIR CON-
TROL SOLENOID VALVE.
1) Turn ignition switch to OFF.
2) Disconnect connector from idle air control solenoid
valve.
3) Turn ignition switch to ON.
4) Measure voltage between idle air control solenoid valve
and body.
: Connector & terminal
(E7) No. 2—Body / 10 V, or more
: Go to step 5.
: Repair open circuit of harness between idle air
control solenoid valve connector and ECM con-
nector.
OBD0368A
5CHECK HARNESS CONNECTOR BETWEEN
ECM AND IDLE AIR CONTROL SOLENOID
VA LV E .
1) Turn ignition switch to OFF.
2) Disconnect connector from ECM.
3) Measure resistance of harness connector between
ECM and idle air control solenoid valve.
: Connector & terminal
(B84) No. 11—(E7) No. 3 / 10Ω, or less
(B84) No. 12—(E7) No. 1 / 10Ω, or less
: Repair open circuit of harness between ECM con-
nector and idle air control solenoid valve connec-
tor.
: Go to the next step.
OBD0369A
4) Measure resistance of harness connector between
ECM and body to make sure that circuit does not short.
: Connector & terminal
(B84) No. 11—Body / 1 MΩ, or more
(B84) No. 12—Body / 1 MΩ, or more
: Confirm good condition in connectors of idle air
control solenoid valve circuit.
: Repair short circuit of harness between ECM con-
nector and idle air control solenoid valve connec-
tor.
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Page 1468 of 2248
OBD0370
AI: DTC P0506
—IDLE CONTROL SYSTEM RPM LOWER
THAN EXPECTED (ISC
—L)—
DESCRIPTION:
Refer to“AH: DTC P0505—IDLE CONTROL SYSTEM
MALFUNCTION—[T11AH0]”.
DTC DETECTING CONDITION:
Two consecutive trips with fault
TROUBLE SYMPTOM:
Engine is difficult to start.
Engine does not start.
Erroneous idling
Engine stalls.
1.Check DTC P0505 on display.
No
Ye s
Inspect DTC P0505 using“11. Diagnostics Chart
with Trouble Code [T1100]”.
In this case, it is unnecessary to inspect DTC
P0506.
2.Check air intake system.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
[T3D0] and [T3E0].>
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Page 1469 of 2248
2
CHECK AIR INTAKE SYSTEM.
1) Turn ignition switch to ON.
2) Start engine, and idle it.
: Is clogging the by-pass line between by-
pass hose and intake duct?
: Repair the by-pass line.
: Replace idle air control solenoid valve.
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Page 1470 of 2248
OBD0371
AJ: DTC P0507
—IDLE CONTROL SYSTEM RPM HIGHER
THAN EXPECTED (ISC
—H)—
DESCRIPTION:
Refer to“AH: DTC P0505—IDLE CONTROL SYSTEM
MALFUNCTION—[T11AH0]”.
DTC DETECTING CONDITION:
Two consecutive trips with fault
TROUBLE SYMPTOM:
Engine keeps running at higher revolution than specified
idling revolution.
1.Check DTC P0505 on display.
No
Ye s
Inspect DTC P0505 using“11. Diagnostics Chart
with Trouble Code [T1100]”.
In this case, it is unnecessary to inspect DTC
P0507.
2.Check air intake system.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
[T3D0] and [T3E0].>
264
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Page 1471 of 2248
2
CHECK AIR INTAKE SYSTEM.
1) Turn ignition switch to ON.
2) Start engine, and idle it.
:Check intake manifold, idle air control
solenoid valve and throttle body for loose
installation and gasket for cracks.
Check by-pass hose for loose connection
and cracks.
Check vacuum hoses for disconnections.
: Repair air suction and leaks.
: Replace idle air control solenoid valve.
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Page 1472 of 2248
AK: DTC P0600
—SERIAL COMMUNICATION LINK
MALFUNCTION—
DESCRIPTION:
The serial communication link circuit monitors data com-
munication between scan tool and ECM.
DTC DETECTING CONDITION:
Two consecutive trips with fault
1.Check harness.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
[T3D0] and [T3E0].>
WIRING DIAGRAM:
LHD model
B2M0627
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11. Diagnostics Chart with Trouble Code